* [feat]:support display paramwise result in constructing optimizer

* [fix]:fix format issue

* delete unnecessary rank logic and fix format

* Support default_scope when building optimizer and evaluator.

* add docstring

* fix

* fix

* [Feature]: Add optimzier and constructor.

* refactor unit tests

* add optimizer doc

* add parrots wrapper

* add parrots wrapper

* solve comments

* resolve comments